@misc{indiciae1c9f7c70f2a0,
  title = {Geologic map of the Little Frog Roadless Area, Polk County, Tennessee},
  author = {E. R. Force},
  year = {1981},
  doi = {10.3133/mf1338a},
  url = {https://pubs.usgs.gov/publication/mf1338A},
  note = {Source identifier: mf1338A}
}